川西茶区茶黑刺粉虱的田间消长动态

为掌握黑刺粉虱在川西地区茶园的发生动态,为其绿色防控打下基础,通过7年田间调查,系统研究黑刺粉虱的空间分布,卵、各龄幼虫(共3龄)、蛹和成虫的田间消长动态。结果表明:黑刺粉虱主要分布于茶棚中下层,约占虫口总数的90%,其中约70%的虫口分布于茶棚下部;川西茶区黑刺粉虱1年发生3~4代,主要以2~3龄幼虫越冬,越冬存活率约20%;黑刺粉虱在叶层厚且郁闭的茶园发生较重。

Field Growth and Decline Dynamics ofAleurocanthus sp.in Western Sichuan Tea Area

In order to explore the occurrence dynamics of Aleurocanthus sp.in western Sichuan tea area, and lay the foundation of green prevention and control, through seven years of field investigation, the spatial distribution, field growth and decline dynamics of eggs, larvae(three instars in total), pupae and adults were studied systematically.Results: Aleurocanthus sp.was found mainly in the middle and lower parts of the tea trees, accounting for about 90% of the total population.Aleurocanthus sp.appeared 3~4 generations every year in the western Sichuan tea area, and lived through the winter mainly by the 2nd and 3rd instar larvae, and the survival rate of overwintering was about 20%.Aleurocanthussp.seriously occurred in thick leaves and closing tea plantations.